BRUEL & KJAER 2240 - Power Supply; Warm-up Time; CE-mark and C-Tick mark Compliance

PART 1
English
21
Operation
Display
During normal operation, you use the display screen to view your measurements. The informa-
tion provided is described below.
Fig.4.5 The display screen
1) Mark for calculating: This symbol is displayed and flashes when the instrument is
measuring.
2) Elapsed time: Displays the amount of time that has passed since measurement began (from
1 second to 60 minutes). After the 60-minute maximum has elapsed, all measurements
automatically stop.
3) The bottom end of the measurement range (in decibels): Sounds 0.5 dB or more below
this level register as under range. To change the measurement range, stop the measurement
and press .
4) Quasi-analogue bar graph: Shows a graphical representation of the current sound pressure
level. It is updated 10 times per second.
5) The upper end of the measurement range (in decibels): Sounds 0.3dB or more above
this level trigger an overload warning. To change the measurement range, stop the measure-
ment and press .
1. Mark for calculating
.
2. Elapsed time
4. Quasi-analogue bar graph
5. Upper end
of measurement
range in dB
6. Under-range
indicator
7. Calibration value
8. Overload
indicators
9. Parameter
display
10. Sound pressure
level value
11. Battery level
12. Peak or Time weighting
3. Bottom end of
measurement range
in dB